Comment 5 for bug 768846

Here I am having the same problem with our server since we upgraded them to 11.04 (natty):

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langner@mars:~$ ll /net/cns2/
ls: cannot access /net/cns2/: No such file or directory
langner@mars:~$ ll /net/cns2/.
ls: /net/cns2/./user: No such file or directory
ls: /net/cns2/./astro: No such file or directory
ls: /net/cns2/./NTOF: No such file or directory
total 0
drwxr-xr-x 2 root root 0 Jul 30 15:08 NTOF
drwxr-xr-x 2 root root 0 Jul 30 15:08 archive
drwxr-xr-x 2 root root 0 Jul 30 15:08 astro
drwxr-xr-x 2 root root 0 Jul 30 15:08 projects
drwxr-xr-x 2 root root 0 Jul 30 15:08 user
langner@mars:~$ ll /net/cns2/.
ls: cannot access /net/cns2/./user: No such file or directory
ls: cannot access /net/cns2/./astro: No such file or directory
ls: cannot access /net/cns2/./NTOF: No such file or directory
total 0
d????????? ? ? ? ? ? NTOF
dr-xr-xr-x 4 root root 0 Dec 10 2009 archive
d????????? ? ? ? ? ? astro
dr-xr-xr-x 53 root root 0 Jul 28 12:28 projects
d????????? ? ? ? ? ? user

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In addition, we identified that when setting a very short autofs unmount timeout (via "--timout X" option) this timeout is never reached and the mount point which was automounted stays forever.

The interesting part to not is, that when downgrading to kernel 2.6.35-30-server from 10.10 (Maverick) the problem instantly vanishes as you can see here:

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langner@mars:~$ ll /net/cns2/
total 0
drwxr-xr-x 2 root root 0 Jul 30 15:12 NTOF
drwxr-xr-x 2 root root 0 Jul 30 15:12 archive
drwxr-xr-x 2 root root 0 Jul 30 15:12 astro
drwxr-xr-x 2 root root 0 Jul 30 15:12 projects
drwxr-xr-x 2 root root 0 Jul 30 15:12 user
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Thus, I also suspect a kernel problem! Please also note that even upgrading to kernel 2.6.38-11-server which is still under development didn't solve the problem.

In addition, please remove the incomplete status of this bug report as we should have supplied enough information here to get some more priority on the issue!